Author: Stanton, T.
Title: The Colorado Formation and its invertebrate Fauna.
Description: Washington, DC, U.S. Geol. Survey, 1893. 8vo. 190 pp., 45 engraved plates. Original printed wrappers. = Uncut. Plates show molluscs. Binding a bit weak; cancelled stamp on front wrapper; otherwise a very good, complete, clean copy.

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